Deviation Alarm Check偏差報.警檢查

The deviation alarm check function generates a deviation alarm when the absolute value of deviation (DV) between the setpoint value (SV) and process variable (PV) exceeds the absolute value of the preset deviation alarm setpoint (DL).當設定值與過程變量之間的偏差的絕對值超過設定的偏差報.警設定,偏差報.警檢查將產生一個偏差報.警.

• When the deviation (DV) exceeds the high limit of the deviation alarm setpoint (DL):A positive deviation alarm (DV+) is generated.當偏差超過偏差報.警設定點的上限時:一個正偏差報.警產生ASD533-S00/SD3S0.

• When the deviation (DV) falls below the low limit of the deviation alarm setpoint (DL):A negative deviation alarm (DV-) is generated.當偏差降至偏差報.警設定點的下限時:一個負偏差報.警產生ASD533-S00/SD3S0.

The deviation (DV) of the process variable (PV) from the setpoint value (SV) is represented by the following b: DV=PV-SV     DV,PV,SV之間的關系可被描述為以下表達式: DV=PV-SV

SEE ALSO參考

For the details of the deviation alarm check, see C5.6, “Deviation Alarm Check.”

詳細的偏差報.警檢查介紹,參考C5.6, “Deviation Alarm Check.”

■ Setpoint Value Limiter設定值限制器ASD533-S00/SD3S0

The setpoint value limiter function limits the setpoint value (SV) within a range between the setpoint high limit (SVH) and setpoint low limit (SVL).設定值限制器起到限制設定值在設定點高限和低限之間范圍內.

The bs of the setpoint value limiter are described below:設定值限制器的作用描述如下:

• When a value exceeding the setpoint high limit (SVH) or high alarm setpoint (PH) is set as a setpoint value (SV):當設定值是一個超過設定點高限或高報設定點的值:

An acknowledgment dialog box appears to b for the operator’s confirmation. To check alarm operation, the operator can set a value exceed the setpoint high limit (SVH) or high alarm setpoint (PH).一個確認對話框將出現提示操作者確認.核對報.警操作,操作者可以設定一個超過設定點高限或高報設定值的值ASD533-S00/SD3S0.

• When a value below the setpoint low limit (SVL) or low alarm setpoint (PL) is set as a setpoint value (SV):當設定值是一個低于設定點下限或低報設定點的值:

An acknowledgment dialog box appears to b for the operator’s confirmation. To check alarm operation, the operator can set a value exceed the setpoint low limit (SVL) or low alarm setpoint (PL).一個確認對話框將出現提示操作者確認,核對報.警操作,操作者可以設定一個低于設定點的下限或低報設定點的值ASD533-S00/SD3S0.

The beters of the setpoint value limiter:設定值限制器的參數

• Setpoint high limit (SVH):設定點高限

Engineering unit data within the PV scale range. PV量程內的工程單位

The default is the scale’s high limit.缺省為量程高限

• Setpoint low limit (SVL):設定點低限

Engineering unit data within the PV scale range. PV量程內的工程單位

The default is the scale’s low limit.缺省為量程低限